InputMethodAndSubtypeEnabler use DashboardFragment

- Move preference log to InputMethodAndSubtypePreferenceController
- Add input_methods_subtype.xml

Test: manual
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.inputmethod
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.core
Test: atest UniquePreferenceTest

Change-Id: I45b6e8303d94ef07d17016eeed1d728432a70d98

src/com/android/settings/inputmethod/InputMethodAndSubtypeEnabler.java

@@ -16,17 +16,18 @@
 
 package com.android.settings.inputmethod;
 
+import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
-import androidx.preference.PreferenceScreen;
 import android.text.TextUtils;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
-import com.android.settings.SettingsPreferenceFragment;
-import com.android.settingslib.inputmethod.InputMethodAndSubtypeEnablerManager;
+import com.android.settings.R;
+import com.android.settings.dashboard.DashboardFragment;
 
-public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
-    private InputMethodAndSubtypeEnablerManager mManager;
+public class InputMethodAndSubtypeEnabler extends DashboardFragment {
+
+    private static final String TAG = "InputMethodAndSubtypeEnabler";
 
     @Override
     public int getMetricsCategory() {
@@ -34,8 +35,18 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
     }
 
     @Override
-    public void onCreate(final Bundle icicle) {
-        super.onCreate(icicle);
+    protected int getPreferenceScreenResId() {
+        return R.xml.input_methods_subtype;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
 
         // Input method id should be available from an Intent when this preference is launched as a
         // single Activity (see InputMethodAndSubtypeEnablerActivity). It should be available
@@ -44,11 +55,8 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
         final String targetImi = getStringExtraFromIntentOrArguments(
                 android.provider.Settings.EXTRA_INPUT_METHOD_ID);
 
-        final PreferenceScreen root =
-                getPreferenceManager().createPreferenceScreen(getPrefContext());
-        mManager = new InputMethodAndSubtypeEnablerManager(this);
-        mManager.init(this, targetImi, root);
-        setPreferenceScreen(root);
+        use(InputMethodAndSubtypePreferenceController.class).initialize(this /* fragment */,
+                targetImi);
     }
 
     private String getStringExtraFromIntentOrArguments(final String name) {
@@ -69,16 +77,4 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
             getActivity().setTitle(title);
         }
     }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-        mManager.refresh(getContext(), this);
-    }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-        mManager.save(getContext(), this);
-    }
 }

src/com/android/settings/inputmethod/InputMethodAndSubtypePreferenceController.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.inputmethod;
+
+import android.content.Context;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+import com.android.settingslib.inputmethod.InputMethodAndSubtypeEnablerManager;
+
+import androidx.preference.PreferenceFragment;
+import androidx.preference.PreferenceScreen;
+
+public class InputMethodAndSubtypePreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart, OnStop {
+
+    private PreferenceFragment mFragment;
+    private InputMethodAndSubtypeEnablerManager mManager;
+    private String mTargetImi;
+
+    public InputMethodAndSubtypePreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    public void initialize(PreferenceFragment fragment, String imi) {
+        mFragment = fragment;
+        mTargetImi = imi;
+        mManager = new InputMethodAndSubtypeEnablerManager(mFragment);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mManager.init(mFragment, mTargetImi, screen);
+    }
+
+    @Override
+    public void onStart() {
+        mManager.refresh(mContext, mFragment);
+    }
+
+    @Override
+    public void onStop() {
+        mManager.save(mContext, mFragment);
+    }
+}